Seiko Cal. 0770 - 402

The Seiko 0770-402 represents an important milestone in Seiko's 1971 lineup. Powered by the 0770 caliber with 28j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-a2bdd92adf84]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1971

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